Underground mine car



Dec. 8,-1936. H. F-. FLOWERS UNDERGROUND MINE CAR Original Filed Deo. '7, 19

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H. F. FLOWERS UNDERGROUND MINE CAR Original Filed Dec. 1931 l0 Sheets-Sheet 2 I.. 31|-: ---4.11.2 Il..-

HENRYFORTFmwE/s H. F. FLOWERS UNDERGROUND MINE CYAR Dec. 8,1936.

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v 8, 1936.` H. F. FLOWERSv 2,063,544

UNDERGROUND MINE CAR original Filed Deck/Q 1931 1o sheets-sheet 4 Dec. 8,' 1936'.

H. F. FLOWERS UNDERGROUND MINE CAR Original Filed Dec. '7, 1931 l0 Sheets-Sheet 5 Dec. s, 1936.

H. F. FLOWERS UNDERGROUND MINE CAR Original Filed Dec. 7, 1931- 10 Sheets-Sheet 6 Sme/nto@ HENRY Forer H owfrs Dec. 8, 1936. H. F. FLOWERS 2,063,544

UNDERGROUND MINE CAR Original vFiled Dec. 7, 1931 10 Sheets-Sheet '7 Dec. 8, 1936.

H. F. FLOWERS UNDERGROUND MINE CAR 10 Sheets-Sheet 8 Original Filed Dec. 7, 1931 u. mm WE 3W 0 w cm, w m H Dec. 8, 1936. H. F. FLOWERS 2,063,544

UNDERGROUND MINE CAR Original Filed Dec. 7, 1931 l0 Sheets-Sheet 9 Dec. 8, 1936.

H. F. FLowERs UNDERGROUND MINE CAR original Filed Dec. 7, 1931 1o sheets-sheet 1o Hav/ey FORT FLOWERS Patented Dec. l 8,l 1936' PAT-ENT oI-Flcu` UNDERGROUND MINE CAB Henry Fort Flowers, Findlay, Ohio .Application December i. 1931', serial Nn. 579,540 Renewed May 18, 1936 24 Claiml. (Cl. ,10S- 2115) This invention relates to improvements in dump vehicles and more particularly concerns 4a dumpk vehicle in which the running gear is compact and of low height so that the maximum load capacity is assuredl for a given height and Width of vehicle, and hence the invention is particularly applicableto cars for use in mine tunnels, andr in .service where a low center of gravityis desirable.

lo. One of the features of the present invention is the provision of a simple and compact door control mechanism which is normally operated to hold the doors closed during transport. and which is operated by a tilting movement of the car about the 'fulcrum at the dumping side; to permit a relative closing of the door with respect to the body without breakage of parts; and to produce a positive closing of the door during the return of the body from tilted position, while permitting the door to remain without complete closure inthe event that an obstacle is present 'to prevent such closures, without breakage of parts. Further, the door control device maintains the door at the raised side of the car closed..

Another feature of the present invention is the provision of a door control structure comprising frame and body members and an intermediate toggle member resting on the frame member and pivotally supporting the body member, this toggle member normally remaining stationary with the frame during tilting htoward the adjacent side, and being tiltable with respect to the frame when the door on the adjacent side is blocked against opening: A g

The many other features of construction which form parts of the present invention are set forth in the course of the following specification and claims. An illustrative form of the invention is set forth in the accompanying drawings.

In the drawings:

Figure 1 is a transverse vertical sectional view through the underframe, -body, doors and controlling elements with a door obstructed against opening-while the body is being tilted. y Figure 2. is a fragmentary correspondingy view with the body and door in transport position'.

Figure 3 is a corresponding view with l,time body and door in fully opened position.

- Figure 4.x is a fragmentary plan Viewl vof the underframe. Figure 4a is a fragmentary plan view of the car, with a portion broken away 'toshow the position of one truck as the car travels a' curve.

Figure 5 is -a fragmentary vertical longitudinal section through the body and showing the' frame in elevation.

Figure 5a isi a fragmentary sideV elevation of the body and frame.

Figure 6 is a vertical transverse section, on 5 line 6-6 ofv Figure 8 with a central portion broken away to show the spindle bolt, on a larger scale through one of the truck pivots and the door operating mechanism.

Figure 7 is a similar section, substantially on 1u line 'I--1 of Figure 8showing a dierent portion of the door controlling elements'.

'Figure 8 is a.. longitudinal sectional View substantially on line 3-8 of Figure 7.

Figure 9 is a plan view, vwith parts broken la away, corresponding to Figure 6.

Figure '1Q is an end view of one of the door and truck castings.

Figure 11 is a view of the casting of Figure 10, showing the left hand end thereof lwith parts 20 broken away.

Figure 12 is a similar view of the right hand end of the castingof Figure 10.

Figures 13 and 14 are sectional views of the door hinge casting substantially on lines i3|3 25 and I-ii of Figure 15.v

Figure 15 is a bottom view of the door hinge Figure 16 is an elevation of a door e cast:- ing,'showing door sheets in section and secured 30 thereto.

f Figure 1'1 is a side elevation of the door hinge casting. l

Figure 18 is an axial elevation of a hody'cast Figure 19 is a side eievation of the same, with 3 parts broken away to show the individual walls.

Figure 20 is an axial elevation of a toggle plate member.

Figure 21 is a side elevation of. the same. 40

Figure 22 is a perspective view ona larger scale of a toggle slide piece.

Figure 23 is a sectional` view corresponding to Figure 6 but indicating a tilted position beyond that shown in'AFigure 3. 45

In these drawings, the mine caris illustrated -asadapted to travel on rails lll by means of anged wheels Il. A'frame asembly comprises longitudinal channel and I-beams l2 on top of which is secured a stifiening plate i3 and to 5o the 'bottom of which are securedthe transverse stiifenng straps I4 which are located between the pairs of wheels Il in each truck and project beyond the rails and are secured to the bottoms of the buckets Ii of theV door and body supports, 55

which will be described in detail hereinafter, and serve to brace these buckets. The body oomprises the transverse reinforcing beams II, and the bottom sheet I1 is secured on top of these members I8 and isbent downwardly at the sides to provide the skirts I3 which enclose the buckets I5 while the car is in transport condition, being reinforced by angle irons Il 'welded to their lower edges.

The skirts I8 are illustrated being cut away in the transverse vertical plane of the stiffening straps Il for the reception of body hinge castings which will be described in greater detail hereinafter. and which supportthe hinge pins 2l ofthe door castings 22 to which are secured the inner door sheet 23 and the outer door sheet 24. The body bottom sheet i1 is joined by the end sheets 25 for completing the body box. The body reinforcing beams ila above the straps i4 are illustrated as channels with their anges directed away from one another so that, in the transport position, they closely fit the parallel channel members |2a secured on top of the frame plate I3.

Four of the body support members (Figures 10, 11 and 12) are connected to the car frame, and are illustrated as integral castings and as of inverted U-shaped with an externally and downwardly projecting web 35 extending in the longitudinal direction of the car and merging into the bottom web 3l which in turn merges with the upwardly extending web 32 having a rounded lip 33 at its upper edge. The webs 3l, 3| and ,32 provide the buckets I5 hereinbefore described, two of Vthese buckets being provided by each casting, the two buckets being separated by a vertical transverse stiiening and guiding web 34. The webs 3l and 34 pass into a hollow box portion 35 of the casting having a central vertical aperture therein for the reception of the truck pivot as will be described hereinafter. Internal stiilening walls 35 are preferably provided for this box portion 35 for strengthening the annular wall 6I. At the inner end, the box portion 35 has the downwardly depending leg comprising the two spaced transverse webs 31 and the longitudinal connecting web 38. In webs 31 are provided openings for the truck spring rods 89, 69a as will be described hereinafter.

The upper portions of walls 31 and the box portion are shaped externally to flt in the grooves of the channels I2a, to which they are secured by rivets passing through holes 42. As shown in Figure 6, each body support casting is also attached by bolts 4l, passing through the web 38 to the adjacent I-beam i2 of the frame, a recess Il (Figures 10 and 11) being provided to receive the upper angle of the I-beam and the plate .|3. A strong and rigid assembly is thus produced.

Received within the vertical aperture in the box portion 35 is a king-pin 5I having a ilange 5l at its upper end resting on a boss lla of the casting (Figures 6`and 10). Thisking-pin has a passage I2 therein for lubrication, and a conventional attachment ll for the insertion of lubricant is shown. The lower end o! the king-pin issupportedinthetiestx'apil,asplitringl4 engages in a peripheral groove of the king-pin 5l to prevent upward movement of the pin.

Surounding the king-pin and rotatable thereon is a hollow sleeve ll-havlng formed integrally therewith a bottom plate l. and a cylindrical spaced wall l1. Sleeve I5. plate Il and wall 51 form an annular cup for the reception of the accepta lower end of the truck spring il whose upper end rests against a disc Il loosely surrounding king-pin Il. A wear disc 5l is provided between disc I9 and the inner surface of the box portion 35 of the body support casing. the upper 5 'ing collars 6I. The end collars 65 may likewise provide bearing supports for the wheels ii. The-l truck Vassembly just described is not claimed herein, but lis shown, described and claimed in my co-pending application Serial No. 615,735, filed June 6, 1932. The inner trunnion l2 has an extension 61 .which is flattened down to provide spring plunger abutment surfaces 6l having substantially vertical walls transversely of the car and being received between the ends of spring plungers B8, 59a which are loosely guided in the apertures 39 of the body support casting at their adjacent ends and by the angle brackets l0 at their distant ends. The plungers 6I, a are threaded near their adjacent ends to receive the nuts Il which permit adjustment of the positions of the plung'ers with respect to one another, and also engage with the adjacent ends of theA truck guiding springsy 12, 12a which at their other ends rest against washers 13 held by the angle brackets 1l. It will be noted that the springs tend to move the plungers Lina toward one another so that with nuts 'il adjusted against boss on 31, the extension 61 is held centrally. Thus the axis of the' trunnions 62 tends to remain transverse ofthe vehicle: but the truck is permitted to rotate about king-pin Ill when the car is on curved track.

The door hinge castings 25 (Figures 7, 8, 18 and 19) have upper walls 3l to which the body bottom I'l lis riveted; the bearing portions li for the door hinge pins 2|; the downwardly lextending front web wall 32 which at its lower end Il, IIa, 83a,

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trol link u, t0 be described hereinafter. Each site l2whicliisguidedbythebossatthebottom of cavity Il. These plates f ingontheuppa-mrfaceofthewebsll a cavity furthe reception oi' the toggle swirl 2,063,544 buckets I5'i and have walls '94a which conform closely to the shape of the web 32 and the upper lip 33- thereof, so that the plates may rock around 'the'roundedlip33 as on a 'pivot'. The upper rear walls 95 of plates 90 restv against bosses 96 on the body support casting (Figures 6 and-l0) so th.'t"'the'plates 90 are heldin position against movement transverse to the car, when lowered, and are returned from pivotal tilting about lip 33 into the predetermined position.

The -toggle plates likewise-'provide guides 91 forfa'slid'e piece 98 having a boss 98a entering the upper end of the toggle spring 92. As shown in Figure- 22, this slide piece is bifurcated to provide the spaced apertured members 98h having the apertures 99a therein to receive the pivot pins- 99, the link 84 being accommodated between the spaced members 98h. The links therefore occur in pairs (Figure. 8) at each hinge connection, and are joined by independent pivot pins to the'door castings. These links ,project through slots in the wall 82 of the body castings 20 (Figure 6), and the hinge pinf2| ofthe door likewise lpassesacross these slots (Figures 6 and 8). v

When the bod'yeisin normal transport position, the pivot pins 99 are slightly below the plane containing the axes of pivot pins 86 and door hinge pins |00 (Figure 6). The front walll which connects the lateral walls 90r (Figure 2l) of each member 90, rests on the stop B2b projecting inwardly from the outwardly extending portion 82a of wall 82, so that a toggle lock is formed by the toggle plates 90 and the links 84 to holdthe doors closed,v being assisted by the pressure of the toggle springs 92' whichhold the central pivot 99 Ain its end position. j

The door castings comprise 'the' webs I|0 which are apertured for lightness and have the anges `I I I integral therewith for receiving the door plates A23 vand 24, which are rivetedthereto. The upper end of this casting is preferably riveted to: a channel II2. Channel- I|2 forms a stiilening member" which extends longitudinally along the door and is connected to the door plates 23 and 24 to complete a. triangular box section. `The plates 23 and 24 are preferably riveted together at the top edge whereby to'torm a door of maximum strength with minimumthickness so that the dump body has `ajrriaximum cubical -capacity for" any given overall vwidth. The door hinge ilanges' III are riveted directly to outer door plate 24 to -form 'a rigid ldoor structure. The 'inner flange- 575f III is thickened at its bottom to provide a wall around the opening v| I3 which receives the door hinge pin 2|. The outer ilange III has an angular ridge II4 projecting therefrom lto engage 4the edge of wall 82e when the door reaches its 'gully openposi'tion, and 4atits bottom is likewisethickened' to provide surrounding walls for the `apertures I-I5 through which the toggle piv- .ot pins I00'jpass. provided.. and .the web walls 'IIO (Figure 8) merge into downwardly extendingspaced walls II'I between. dwhichis receivedthe knuckle 8| of thebody casting (Figures '1 and Vil )'.A

Spaced outer wallsA II8 serve in commotion with thel walls II'I-tostiffen the walls III.- A dust or sealing strip |20 is riveted at` the bottom of the door plate 23.

The door hinge pin 2| (Figure 8) extends beL yond the walls 83 and has notches therein to receive the plates |30 which are secured by cap screws I3| to these'walls and channels I6a, and

sition in the bucket, and the wall 82 moves in Reinforcing walls II6 are l hold," them against axial movement and vare 6 themselves guided by projections |33 on plates 83 (Figures 18 and 19).

'I'he operation of the vehicle is as follows:

The body being in the positions shown in Fig-Y ures 2, 4. and 4a, it may be loaded in any suitable manner; .It will benoted that the bottom I1 is very close to the road'bed and hence the end wheels and doors may be high without danger of striking a tunnel roof, for example. A maximum -4 capacity is thus afforded. The vehicle may' now be towed to a discharge point. The doors or wheels on each truck, with their flanges also on opposite sides of therespective king-pins 50, cause the vehicle to follow the rails properly even on curves. Further, the centering springs 12, 12a loperate constantly to hold the trucks in their proper central posiltion for straight-away travel.

On 'arriving at the discharge point,- a suitable means is employed for lifting one side of the car. In Figure l,'a fluid pressure cylinder |50 having a plunger piston I 5I and ahead |52 for engagement with the angle iron I9 -is shown in dotted lines. The piston |50 is mounted on a ilxed structure |53, and it will be noted that this structure and the piston are normally located below the `rails I0, although illustratively shown as `broken away to indicate the parts employed. The head |52 has extensionarms |54 and a handle y|55 yby which an operator may swing the deviceand direct litto and away from the edge of body I9. The cylinder head |52 has a hook extension |56 to limit'the'tilting of the body and/or to retard the tilting movement at the end of the stroke of the-piston.

As the head |52 raises the angle iron I9 and i the skirt I8, the body is tilted about Aits oppo- Normally, the feet 94 remain on theV site edge. upper walls of the webs 3| and the body castings 20 rock freely about the pivots 86.- The walls 83 of the body casting lie outside the edges of the web walls,3| of the buckets, so that there is no interference to the free tilting movement of the body. The inner walls '88a are cut away with the top notches 85 so that the entire body casting may turn freely regardless of the presence of lip 83.

During this tilting movement of the body casting 20, each toggle plate 90 remains in poa clockwise direction (Figure 6) away from the corresponding toggle plate 90. The toggle door pivotsA |00 likewise move downwardly in a clockwise direction so that the ultimate effect is to slightly compress the toggle spring 92 at first -until the central toggle pivot 99 is in line with the pivots 86 and |00v and thereafter for this spring to expand. During the continued tilting movement of the body castings 20, therefore, the links 84 act to exertl pulls upon thetoggle door pivots |00 and thus to produce positive opening: of the doors. Ultimately, the ridge I I4 upon the door lcomes down upon the upper edge I of -web 82 (Figure 3) and prevents further rela'- tive movement of the door and body.

During the return from this tilted position, the links 84 act in compression to cause the doorv to move .in a counterclockwise direction about its pivot 2| (Figure 6) whereby the door is. returned to its closed position. During this 7 operation, the toggle spring 92 cornes into action during the latter part of the movement, in which the axis of the spring is at only a slight angle to the line joining the axes of pivots 88 and |00, and thereby is able to. prevent breakage of door members in case a rock or other article is caught between the door and body. This spring 92 also serves to hold the door tight against the end sheets of the body to insure sealing Aagainst spillage of any fine material being carried in the body.

In the event that the door is prevented from opning during the tilting movement of the body,

as for example by the presence of a pile of material (Figure 1), a portion of the door therefore remains relatively at a standstill with respect to the ground track and frame. The continued tilting of the body then causes a downward pressure through the door pivot 2l upon the lever system comprising the door, the links 84, toggle plates 80. Since the link 84 is substantially blocked in its'travel position, which normally is the upper and outermost position in Figure 6, the structure including the door, the links 8,4, pivot 86 and the toggle plate 90 moves together, and the toggle plate 90 therewith rocks about the lip 33 as a pivot (Figure 1) whereby any danger of breaking these elements is avoided. If the door is prevented from moving with respect to the body, as for example when the load of wet material is frozen to the door and body, the combined body structure tends in like manner to pivot about the lip 33, and the weight of the body operating downward at pivot 86 tends to cause a breaking of the toggle upon the lip 33 and then a traction from plates upon the blocks 98 and thus upon the links 84, and thus pulls the door open with respect to the body. This force is dependent upon the distances between the axes of the fulcrum members 86 and 33, 2| and |00, and the dimensions of other parts of the structure, including the height of the door. Hence there is no force great enough to break the parts in case the door cannot be pulled open by this means.

It will be noted that throughout the tilting and returning movements, the central web walls 34 of the buckets on the tilting side have remained between the inner walls 83a. of the body castings, thus preventing any lengthwise displacements of the body on the frame.

At the raised side of the body, the corresponding members have remained in the same position relative to the body as that occupied while in transport. The toggle plate at this side has continued to rest against the inwardly projecting rib 82h on the wall 82 of body member 80, and the toggle plate 90, toggle link 04 and toggle spring 82 are held together in their end position in which the door is blocked closed. It will be noted that even in this position, if the upper door receives an outward push, this motion is absorbed by the toggle springs 82 without breakage of any structure and upon the releasing of such push or force the upper door will be forced tight against the doory jambs, and held sealed there by the action of the springs 82.

Upon the return of the body into its transport position, the walls of the toggle plates encounter the pads 96 on the frame casting and thus guide the body into its proper transverse position.

The relative movement permitted the toggle plate 80 during tilting movement of the body and while the door is blocked (Figure l) is also permitted upon tilting of the body beyond the position shown in Figure 3. Thus in Figure 23 when the body floor I1 is moved beyond the position at which the maximum door opening is permitted, the continued movement of the door pivot 2l as the body tilts causes a tension through the link 84, since the ridge II4 is now engaged with the surface 82o. This tension is exerted upon pivot 98 and thence transmitted through the block 98 shown in Figure 23 to the toggle plate 80. The toggle plate is therefore 4caused to rock around the lip 33, and the normal body pivot 86 is raised. In this way the toggle plate 80 may move from the position shown by the dash and dot line (extending from normal position of the axis of pivot 86, Figure 23) through an angle to the position shown by the dash and double-dot line (pin 86 has been raised, Figure 23). It will be noted that the eiect of this is to shift the fulcrum point of the body from the pin 8B to the lip 33, thus displacing the fulcrum outwardly away from the center of the frame and thus assuring a return of the body by gravitational action. Further, this permits .a con'- tinued movement of the body, with thedoor in fully open position, and Without excessive strain upon the link 84 and-other parts.

The structure thus provides at each side of the body a normal fulcrum about which the body may tilt, and a secondary fulcrum (of which lip 33 forms one element) about which the body may tilt when the door is blocked against opening with respect to the body, whether this blocking occurs by reason of an obstaclevin the path of the door, or the movement of the door into its fully opened position with respect to the body. Specifically, the normal fulcrum occurs between the body and rocker members 90 which during `normal tilting, i. e. the tilting while the door has not yet attained its fully opened position, are resting upon frame members: and these rocker members may move about the lip 33 for providing the second fulcrum: and/or the upper surface 85 of the notch formed in the member 83a rigid with the body may turn about the lip 33, this latter operation occurring when the door is in fully opened position (Fig. 23).

It is obvious that the invention is not limited to the form of construction shown but that it may be modified in many ways within the scope of the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a dump vehicle, a frame comprising longitudinal members, a stifrener sheet secured on top of said members and transverse members secured on top of said sheet, body fulcrum buckets carried by the transverse members at the ends thereof and having supporting surfaces below the tops' of the transverse members, a dump body, and depending fulcrum devices carried by the body laterally beyond the ends of the transverse members and resting on said surface during transport. y

2. In a dump vehicle, a frame comprising longitudinal members, a stitfener sheet secured on top of said members, transverse members secured on top of said sheet, body fulcrum buckets carried by the transverse members at the ends thereof and having supporting surfaces below the tops of the transverse members, a cross brace connecting the buckets on opposite ends of a transverse member and passing below and connected to said longitudinal members.

actas 3. In a dump vehicle, wheeled trucks on opposite sides thereof, a frame including transverse members extending in the transverse vertical planes of the trucks and supported thereby, a dump body, body supports mounted at the'ends of the transverse members, and body fulcrum members mounted on the body to move bodily therewith and resting during transport on said body supports.

4. In a dump vehicle, the combination with a frame and a' body, of a saddle-shaped structure attached to the frame and having supporting surfaces on its outer lower end, a depending support member on said body, a rocker member adapted to rest on said supporting surfaces during transport, and a pivot for connecting said members and providing a fulcrum. about which the body may tilt relative to said frame.

5. In adump vehicle, the combination with a frame and` a body, of a saddle-shaped structure attached to the frame and having a sup'- A porting surface on its outer lower end, a dependa frame and a body, of a saddle-shapedstrucing support member on said body, a rocker member .adapted to.rest on said supporting surface during transport, a pivot for connecting said ymembers and providing a'fulcrum about which the body' may tilt relative to said frame,

a horizontal truck member located in the space beneath said saddle-shaped structure, and a truck pivot mounted in' said structure for rockably holding said truck member..

6. In a dumpvehicle, the combination with ture attached to the frame and having asunporting surface' on its'outer lower end with an upturned longitudinal lip at the outer edge, a depending support member on said body. a rocker member resting' on said supporting surface during transport and having a portion for engaging said lip, a door pivoted on said body on an laxis parallel to said lipja door control device for connecting the rocker member and the door,

and a pivot for connecting said members and providing 'a normal-fulcrum about which said `body may tilt relative to said frame, said rocker member and lip providing a secondary fulcrum 4 about which the body may' tilt when the door is blocked against opening. Y

7. A dump vehicle as in claim 6, in which said door control device comprises a compression link for connecting the door and rocker member and including a loose connection'and a spring for holding said connection extended, said spring being operative to permit yielding of the door upon a blow against the inner surface thereof Ywhen the door is in closed position.

8; In a dump vehicle, a frame, wheels, a saddle-shaped structure having a supporting surface below thewheel axes, 'a horizontal longitudinally extending truck member mounted on saidwheels and passing through the space -beneath said structure, a brace connected to.t.he outer end of said structure and passing beneath the same toward the longitudinal center axis of the vehicle, a vertical pivot joining the structure and brace and passing through the truck member, a body; and a support member carried by said body and resting on said. surface.

9. In a dump vehicle, a. frame, an integral 'structure having a horizontal portion connected to vthe frame and a depending portion for presenting a supporting surfacevbelow said horizontal portion. a body, body supportingmeans depending from 'said body and resting during transport on said surface, and ap upright por.-

tion adjacent said surface for limiting movement of said body supporting means laterally and including'a structure for providing a fulcrum for the body.

10. In a dump vehicle, a frame, means at each side of the frame for providing support surfaces Y below the top of said frame, and inclined guide surfaces between said top and support surfaces,

a body, and depending body members resting during transport on said supporting surfaces and having surfaces cooperating with saidinclined surfaces to center said body on said .frame and to hold said body lagainst lateral shifting during transport. Y

11. A dump vehicle as in claim 10, in which said frame means includes an upstanding flange at the outer edges of said surface and cooperating-with said depending body members tohold the body against lateral shifting during tilting providing a supporting surface below the level.

of the top of said frame, a body, a door pivoted on said body, a pivot carried by said body and located during transport below the level of the top of said frame, a rocker carried by saidvbody pivot and `resting during transport on said surface, a door controldevice for connecting said rocker and the adjacent door wherebyy to holdv the door closed during transportand-to control the opening and closing of the dbor during the tilting'of the body about' said body pivot, a stop on said body engaged /by said rocker to limit the movement thereof,

said rocker and linkhaving a common pivot located during normal transport and during tilting toward the' opposite side relatively below the line of centers of said body pivot and the door pivot so -that when the rocker is engaged with said stop the rocker and link prevent opening movement of the door during tilting toward the opposite side, and a spring included in said control device to-permit relative movement of said link and rocker soY that the rocker may move relative to the body during tilting toward the adjacent side. L 14, In a dump vehicle, a frame, means at each side of the frame for providing supporting sur- -faoes below the top of said frame and` inner and outer upwardly extending surfaces in pairs adjacent said supporting surfaces, a-body, depending body members on said body at its sides, rocker members, pivots for connecting said members, said rocker members resting during' transportn on said supporting surfaces and between said 'pairs of innerand outer surfaces whereby lateral shifting movement of the body .is prevented during transport and wherebylate'ral shifting of said rocker member is prevented during tilting. v

15. In a dump vehicle,. a frame,a tiltable dmnp D01?, a door pivoted to said dump body, an intermediate member normally resting on said frame, a pivotal connection between said member and .said body, adoor-controlling connection between said body and said door, and means on said frame and said member for providing a iulcrum about which said member may turn relative to said frame, said iulcrum means being spaced from said pivotal connection.

16. In a. dump vehicle, the combination of a frame, a body, a fulcrum upon which said body may normally tilt with respect to the frame, a second fulcrum, a door pivoted on said body to fold, down for dumping, a door control device for positively producing opening and closing movements of the door during the tilting and the return from tilting of said body and eiIective when said door is blocked against opening movement during the tilting about said normal fulcrum for causing the body thereafter to tilt about said second fulcrum so as to relieve the door and the controlling mechanism therefor from excessive breaking strains.

17, In a dump vehicle, the combination of a frame, a body, an intermediate member pivotally connected to said body to provide a nor- 1.

ma! iulcrum about which the body may tilt for dumping and normally resting on said frame, a door pivoted on said body, positive means for connecting said member and door to control the opening 'and closing of the door during the tilting and the return from tilting of said body, and means on said member and frame for providing a secondary fulcrum about which the bodymay turn when said door is prevented from opening during the tilting of the body about said lnormal fulcrum so as to relieve the door and the controlling mechanism therefor from excessive breaking strains.

18. In a dump vehicle, thecombination of a frame, a body, means for providing a normal fulcrum about which the body may tilt relative to the frame i'or.- dumping, a door pivoted on said body, stop means on the body for limiting the opening movement of the door relative to the body, positive means for controlling the opening and closing oi.' the door during the tilting and the return from tilting of said body about said normal i'ulcrum, and means on said body and frame for providing a secondary tulcrum about which the body may turn when said door has engaged said stop means.

19. In a dump vehicle, the combination of a frame, a body, an intermediatemember pivotally connected to said body to provide a normal Iulcrum about which; the body may tilt for dumping and normally resting on said frame, a door pivoted on said body, stop means on the body for limiting the opening movement of the door relative to the body, positive means for connecting said member and door to control the opening and closing of the door during the tilting and the return from tilting of said body, and means on said body and frame for providing a secondary iulcrum about which the body may turn when said door has engaged said stop means. v

20. In a'dump vehicle, the combination ofa frame; a body, means for providing a normal fulcrum about which the body may tilt relative to the frame for dumping, a door pivoted on said body, stop means on the body for limiting 4the opening movement of the door relative to the bocLv, positive means for controlling the opening and closing of the door during the tilting and the return from tilt of said body about said normal iulcrum, and means on said body and frame for providing a secondary iulcrum" about which the bodymay turn when said door has engaged said stop means, said secondary iulcrum being farther from the center' of gravity of said body than said normal fulcrum.

21. In a dump vehicle, the combination of a frame, a body, a bodv support normally resting during transport on the frame adjacent an edge of said vehicle, a pivotal connection between said support and said body for providing a ilrst fulcrumabout which the body may tilt with respect to the frame, a down-folding door pivoted to said body adjacent to and on an axis parallel to that of said pivotal connection, a door control device connected to said door and body support and cooperating through said support with the frame and body, means on said door located above the pivotal connection when the door and body are in normal transport position for limiting the opening movement of the door, cooperating door limiting means located on the body outside said iirst fulcrum, and means on l said support and frame for providing a secondary fulcrum outside said ilrst iulcrum.

22. In a dump vehicle, the combination of a frame, a body, body supports 4plvotally mounted on the body adjacent opposite edges thereof and normally resting on the frame during transport, the pivotal connections between said body and said supports providing fulcrums about which the boch! may tilt with respect to the frame, opposite doors pivoted on said body to fold down for dumping, door control devices for said doors each connected to its corresponding door and support and cooperating through said support with the frame and body for holding said door closed dining normal transport and during tilting about the opposite fulcrum and for controlling the opening and eiecting the closing of said door during tilting about the adjacent iulcrum, means on said supports and frame i'or providing secondary fulcrums about which the body and sup'- port may tilt with respect to the frame, and

door limiting means on the body and door and located outside the fulcrums on the corresponding side oi' the car.

23. In a dump vehicle, the combination of a frame, a body. means located adjacent an edge of the body for providing a fulcrum about which the body may tilt with respect .to the trame, a door pivoted on said body to fold down for dumping, a door control device i'or said door connected to said door and body and cooperating with the frame and operating during tilting of the body to control the opening ot the door relative to the body until the door reaches a predetermined position relative to said body, and limit means including elements Arigid with the body and with the door for determining said position and maintaining it during a further tilting of the body, the limit elements on said body being located outside the pivot connection of the door and bodyand thereby operating to relieve downward pressure by the door upon the door pivot as the vehicle lading slides from the body and over the door for dumping discharge.

24."In a dump vehicle, the combination of a frame, a body, means located adjacent an edge of the body for providing a fulcrum about which the body may tilt with respect to the frame, a door pivoted on said body to vfold down for dumping, a door control device for said door connected to said door and body and cooperating with the frame and operating during tilting of the body to control the opening of the door relative to the body until the door reaches a predetermined position relative to said body, and

limit means including elements rigid with the body and with the door for determining said position and maintaining it during a further tilting of the body, the limit elements on said body being located outside the pivot connection of the door and body and thereby operating to relieve downward pressure by the door upon the door pivot as the vehicle lading slides from the body and over the door for dumping discharge,y the limit elements on said door comprising means projecting from the door and located above and outside the door pivot when the body and door are in upright and closed positions for transport and moving with the door during opening into abutting relationship with said body limit elements.

HENRY FORT FLOWERS. 

